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Diffstat (limited to 'experiments/03_20251130_leaving_initramfs/README')
| -rw-r--r-- | experiments/03_20251130_leaving_initramfs/README | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/experiments/03_20251130_leaving_initramfs/README b/experiments/03_20251130_leaving_initramfs/README new file mode 100644 index 0000000..a458ac2 --- /dev/null +++ b/experiments/03_20251130_leaving_initramfs/README @@ -0,0 +1,32 @@ +Goal: boot into initramfs and switch to real system +Status: success + +Added busybox to the mix, incredibely useful here + +init script will create new_root, mount tmpfs there and copy all the binaries +from initramfs to it so we have something to work with. It'll also mount /proc, +/dev and /sys. After that's done it'll switch root and run busybox shell as new +PID 1. + +there's a /new_root/cake file created by the script to confirm that we indeed +changed the root + +Useful resources: +- https://github.com/torvalds/linux/blob/v4.17/Documentation/filesystems/ramfs-rootfs-initramfs.txt +- https://www.kernel.org/doc/html/latest/admin-guide/initrd.html (obsolete but useful) + +Package list: +busybox-static_1.37.0-7_amd64.deb +dash_0.5.12-12_amd64.deb +gcc-14-base_14.2.0-19_amd64.deb +libblkid1_2.41.2-4_amd64.deb +libc6_2.41-12_amd64.deb +libc-bin_2.41-12_amd64.deb +libgcc-s1_14.2.0-19_amd64.deb +libmount1_2.41.2-4_amd64.deb +libpcre2-8-0_10.47-2_amd64.deb +libselinux1_3.9-4_amd64.deb +libsmartcols1_2.41.2-4_amd64.deb +mount_2.41.2-4_amd64.deb +util-linux_2.41.2-4_amd64.deb + |